package swingTest;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

//动态效果
public class Demo_1 extends JFrame {
    //背景
    private BufferedImage bufferedImage;
    //窗体大小
    private int width;
    private int height;
    //照片数组
    private BufferedImage[] images = new BufferedImage[4];
    //要绘制动态图片中的那张
    private BufferedImage image;
    //背景音乐
    private File bgm;
    //播放音乐类对象
    private Demo_2 demo_2 = new Demo_2();
    private int num = 0;//images数组内图片索引

    //初始化
    {
        if (bufferedImage == null) {
            try {
                bufferedImage = ImageIO.read(new File("src\\image\\背景.png"));
                for (int i = 1; i < images.length + 1; i++)
                    images[i - 1] = ImageIO.read(new File("src\\image\\大飞机爆炸" + i + ".png"));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        width = bufferedImage.getWidth();
        height = bufferedImage.getHeight();
        image = images[0];
        bgm = new File("F:\\daneipeixun\\music\\music1.mp3");
    }

    public Demo_1() {
        super("动态测试");
        //设置窗口
        setSize(width, height);
        setLocationRelativeTo(null);
        setResizable(false);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        //启动线程
        MyThread myThread = new MyThread();
        myThread.start();
        //播放背景音乐
        demo_2.playMusic(bgm);
    }

    public static void main(String[] args) {
        new Demo_1();
    }

    //双缓冲绘制解决图片闪烁问题
    @Override
    public void paint(Graphics g) {
        Image image = this.createImage(width, height);
        Graphics gImage = image.getGraphics();
        gImage.setColor(gImage.getColor());
        gImage.fillRect(0, 0, width, height);
        super.paint(gImage);

        //绘制背景
        gImage.drawImage(bufferedImage, 0, 0, null);
        //绘制动态图片
        gImage.drawImage(this.image, 0, 100, null);

        //最后绘制缓冲后的图片
        g.drawImage(image, 0, 0, null);
    }

    //线程内部类
    private class MyThread extends Thread {
        @Override
        public void run() {
            while (true) {
                if (num <= 3) {
                    image = images[num++];
                } else
                    num = 0;
                repaint();
                try {
                    sleep(100);//每隔100毫秒重绘一次
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}